Facts about Evinrude/Johnson racing outboards made my OMC

**lars strom** · 06-23-2020, 01:09 AM

A few years ago..

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**2us70** · 06-23-2020, 05:13 PM

I found that my motors ran better bored out to the first factory replacement size. I think it was because you wound up with round bores after the motor normalized from being run a while.

Originally Posted by lars strom

In a flat water offshore race 1978 our average speed over 2 hours was 90 MPH. WOT at 7,000 RPM..great engine and the 0.20 pistons was much better for some reason.

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**lars strom** · 06-25-2020, 10:15 AM

Some of my history with a 38 ft Larry Smith built Scarab. Powered by 3 X OMC V8 outboards by Evolution Marine.

I meet Marvin Catrett the owner of Evolution Marine in Morgan City, Louisiana
1987 at a Offshore race in Marathon.
Marvin was big into making lots of horse power out of stock OMC V8 production outboards.
If I remember right the Phase 4 modifications of the OMC V8 was the most powerful.
He supplied three of the Phase 4 V8 engines for a 38 ft Larry Smith built Scarab.
This boat was used as a pace boat and rescue boat at the Offshore races.
A ended up buying this boat and exported it to Patrick Rinne in Finland.
Patrick raced the boat a few times in the Stockholm – Helsinki race 1988.
There was two Evolution Marine Scarab 38 built and rigged the same way.
Also a 43 ft with similar rigging.
Here is a mix of pictures.
In 1999 we traveled to Morgan City in our Motor-home home and parked at his house.
Marvin’s wife Donna made Cajun style crayfish and we had a very good time.
Thanks for all the fun memories Marvin. R.I.P.
http://svera.se/blogg/marvin-catrett-evolution-marine-high-performance-omc-v6-and-v8-engines/